Cement-kiln.



PATENTED APR. 30, 1907. 14 110 T. M. MORGAN.

CEMENT KILN.

APPLILLTION FILED MAR. 1 1906.

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THOMAS MATTHEW MORGAN, OF LONGUE POINTE, QUEBEC, CANADA.

CEMENT-KILN.

I Specification of Letters Patent.

Patented April 30, 1907.

Application filed March 1,1906. Serial No. 303,582.

To all whom it may concern.-

Be it known that I, THOMAS MATTHEW MORGAN, of the village of Longue Pointe, in thecounty of Hochelaga, Province of Quebec, and Dominion of Canada, have invented certain new and useful Improvements in Gement-Kilns, of which the following is a full, clear, and exact description.

My invention relates to the process of burning cement in kilns of the rotary type, and one of the main objects is to impart to the flame of combustion a syyirligggllilflvingn 1ption, thereby lengtheningitspassage thr uglitHfEiliiand pin ing it intg noreintimate contact withtlie' circu mierence of the A further object consists in utilizing a large proportion of the heat contained in the clinker or cement, as it is discharged from the kiln, to raise the temperature of a volume of air which is forced into the kiln and mixed with the inflammable gas to complete its combustion.

In accomplishing these objects, I provide circumferential bathe plates at the mouihef the kiln and an inclined discharge way for the cement as it drops from the kiln. I further provide one or more streams of steam or air under pressure, which is passed over the hot cement and around the intervening channel between the bafiie plates and the kiln, and from thence into the kiln. The stream of air, thus drawn into the kiln, is heat-ed to a high temperature and is given a revolving motion so that when it comes in contact with the flame of combustion it imparts its motion to said flame and becomes thoroughly mixedwith the inflammable gas, thereby aiding in the complete combustion of the latter. As cold air is excluded from the kiln, and as the current of air, which is passed over the clinke'r and around the circumferential baffle plates, becomes heatedv to a high temperatur immediate combustion will take place wi h the inflammable gas without reducing the temperature to any extent. 3

In the drawings which illustrate my invention;Figure 1 is a sectional perspective view showing the relative positions .of. the parts and the swirling motion assumed by the flame in its passage through the kiln. Fig. 2 is an end view of the kiln, showing the battle plates and the inclined passage way for the cement, and-also the direction of impact of the steam or compressed air. Fig. 3 is a view similar to Fig. 2 showing an alternative construction.

Referring to the parts, 1 designatesa cylinder of the usual type revolving in the direction of the arrow 1".

2 denotes a hollow fire brick structure adjacent to the mouth of the cylinder 1, having a flue 3 adapted to discharge gas or other material into the kiln. 4 is an extension wall above the structure 2 for protecting the operators from the intense heat. '5 is a lining of fire brick, or other suitable material, inclosing the cylindrical space 6. the cement which is fed into the inchned cylinder at the opposite end, and which is gradually advanced by a revolving motion until it is discharged from the mouth of the kiln.

8 represents a battle plate, which is fastened to the front wall 4 of-the structure 2 at the mouth ofthe cylinder. projecting flange 9 on the adapted to fit as closely as possible around the revolving cylinder 1 to prevent the escape of the heated air and to prevent the ingress of cold air. In the preferred form of construction, the baiiie plate ,8 extends to a point near the top ofthe cylinder, as shown in Fig. 2. A second baffle plate 9, similar to the first, is attached to the opposite side of the cylinder, as shown in Fig. 2, and extends approximately one third of the distance around the cylinder. An inclined discharge way 10 for the cement, is formed by extending the baffle plate 8 tangentially from the bottom of the cylinder at such an angle that the cement will fall freely down the incline. A lining 1], of fire brick, is provided forthe incline 10 to prevent the cement from burning the metal. A pipe 12, adapted to convey steam or air under pressure, is arranged with a bent nozzle 13 so that it will discharge its contents upwardly over the hot clinker or cement and into the channel between the baffle plate and the mouth of the kiln, as shown by the arrows 14. Asecond pipe 15is extended upwardly and has a bent nozzle 16 adapted to discharge its contents downwardly into the channel between the baifle plate 9 and the cylinder, in the direction shpwn by the arrows 17.

i In the alternative construction shown in Fig.3, a baflle plate 8 is extended over the top of the cylinder, and the nozzle 16 of the A downwardly baffle plate, is

pipe 15 inserted in the position shown to discharge the blast of air or steam downwardly, thus assisting the current of air represented 7 represents by the arrows 14. Valves 18, for controlling The advantages of. this apparatus Iwillbe readily apparent. A large proportion of the heatordinarly lost inthe discharge of the hot cementfis recovered.- and forced into the-kiln toiassist inthe-operation ofburning fresh cement. By forcing a stream of air around the outer circumference of the-mouth of the kiln, the: baffle platesare protected from too intenseaheat, and, atthe same-time, the heated air-mixes thoroughly with the inflammable gasand imparts to it the swirling motion which lengthensits path through. the kiln. It. is. found. that. a much greater quantity of cement can. be burned to. the proper degree by a plying this apparatus.

W e I have shown thepreferred form of the apparatus I wish to employ, I do not Wish:to.- limit myself to the precise construction-discloseias severalmodifications of the v device-.may be-made without departing from the spirit of, my invention.

Having thus described my invention so that-thesame may be readily understood by those sk-illedrin the art to Which-it appertains, what. I claim and desire. tosecure by Letters Patent is:-

1-. In a device of the class'described, means fordischarging a quantity of pre-heated air into the kiln, and means for imparting to said air a swirling or revolving motion.

' 2:. In a deviee'of theclass described, means for passing a quantity of air over the cement asit' isjdischarged from the kiln, means for imparting a= swirling or revolving motion to said air as it enters the kiln, and means for preventing the access of cold air at the mouth of the kiln.

3..I'nadevice of the classdescribed, means for passinga quantity of air over the cement asit is discharged from the kiln, means for thoroughly-mixing said air with the flame of. combustion, and. means for preventing the access of: coldair into the kiln and for impartingtothe-flame of combustion a circumferentially revolving motion.

4. In-adevice-of the class described, means for passing a quantity of air or steam over the cement as it is dischargedfrom the kiln, and means for deflecting said steam or air into theekilnwith-a circumferentiall y revolvingmotion.

' '5. In a; device of the class described, means for pre-heating a quantity of air, and means for deflecting said air in a] circumferential direction at the mouth ofthe kiln and discharging it into said kiln with a 'swirlingor revolving motion.

6. In a device of the class described, means for discharging a quantity of inflammable gas into thekiln, a circumferential baffle plate at the mouth of the kiln, an inclined passage adapted to receive the-cement as it drops from the kiln, and means for discharging a quantity of steam or air over said. cement and against said' baflie plate whereby it will be deflected into-the kiln with-a swirling or revolving motion.

'7. In a cement kiln, means for discharging revolving motion to be thoroughly mixed.

witlrthe inflammable material.v

8. In acement kiln, means for discharging a quantity of inflammable material into thev kiln, a circumferential deflecting plate located ,at the mouth of the kiln and inclined downwardly at the bottom of the kilnin a tankiln, means for discharging a quantity of steam or air under pressure upwardly along said inclined passage whereby it will be .heated by the cement and'deflected into the ;kiln with a circumferentially revolving moi-tion.

9. Ina cement kiln, means for discharging :a stream of inflammable material into the E kiln, an inclined passage way upon which the .cement is dischargedfrom the kiln, circumferential baffle plates located at the mouth of the kiln, and means for discharging a quantity of air or steam against said baflie plates whereby it will be deflected into the kiln with 'a revolving or swirling motion.

10. In a cement kiln, means for discharging a stream of inflammable gas into the kiln, means for pre-heating a quantity of air, means for deflecting said air into the kiln with a circumferentially revolving motion, and means for excluding from the kiln all except such pro-heated air.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

THOMAS MATTHEW MORGAN. Witnesses C. W. TAYLOR. O. GORMAN.

.gential directionto form a passage way upon which the cement is discharged from the 

